how to define plain and rt tables on same configuration

I am trying to add vector KNN support for my data to feed into an AI system.

I am currently using only plain tables with sources and indexer defined in the .conf file (no data_dir obviously).

I am trying to create an rt-table in rt-mode (via sql) but I get the “CREATE TABLE requires data_dir to be set in the config file“ so no luck there, but is there a way to make plain and rt tables coexist ?

Do I need to define the rt table in plain mode (that is using the conf file) ?

Can anyone share an example of how to achieve this if possible?

Or do I need to convert all my tables to RT in order to use the vector attribute ?

Between rt- or plain-mode and rt- or plain tables it gets quite confusing at times ..

Do I need to define the rt table in plain mode (that is using the conf file) ?

Yes

Can anyone share an example of how to achieve this if possible?